Directional Valves

EP20-S38 — Piloted Poppet–Type Logic Element

DESCRIPTION
A poppet-type, screw-in, cartridge-style, hydraulic directional element, with multifunction
potential when used with other directional, pressure, or flow control devices.

OPERATION
The EP20-S38 is a spring-biased poppet valve which will block 1 to 2 or 2 to 1 until pressure
at 1 or 2 exceeds the cumulative pressure at 3 and bias spring. With no pressure at 3, flow
will be allowed from 1 to 2 or 2 to 1 once the bias spring force is overcome with pressure at
1 or 2. When the element is in the closed state, the ratio of areas 1 and 2 is 1:1, and the ratio
of areas 1 or 2 to 3 is 1:2.